赤泥-矿渣基地聚物固化黄土冻融后力学特性研究
Mechanical Properties of Red Mud-Slag Based Geopolymer Solidified Loess after Freeze-Thaw Cycle
郭强 1张晓雷 2史晨曦 2门杰3
作者信息
- 1. 山西省高速公路集团有限责任公司,太原 030031
- 2. 太原理工大学土木工程学院,太原 030024
- 3. 山西交通控股集团有限公司大同高速公路分公司,大同 037000
- 折叠
摘要
本文通过击实试验获得了不同赤泥掺量、水玻璃模数、水玻璃掺量条件下地聚物固化黄土的最大干密度和最佳含水率;基于最佳含水率结果制作试块并开展地聚物固化黄土冻融循环试验,测试了固化黄土试块的质量损失和无侧限抗压强度,分析了地聚物组成对固化黄土试块抗冻性能的影响.结果表明:地聚物固化黄土试块的最大干密度均小于素黄土;掺入适量地聚物能够有效提升黄土的抗冻性能,且固化黄土的无侧限抗压强度均大于素黄土,最高可达0.7 MPa;随着赤泥掺量增大,固化黄土试块的无侧限抗压强度降低;随着冻融次数增加,固化黄土试块的无侧限抗压强度先减小后增加,最终趋于稳定.
Abstract
In this paper,the maximum dry density and optimum content of geopolymer solidified loess under different red mud content,water glass modulus and water glass content were obtained by compaction test.Based on the optimum moisture content results,the test blocks were made and the freeze-thaw cycle test of geopolymer solidified loess was carried out.The mass loss and unconfined compressive strength of solidified loess test block were tested,and the influence of geopolymer composition on frost resistance of solidified loess test block was analyzed.The results show that the maximum dry density of geopolymer solidified loess test block is smaller than that of plain loess.Adding an appropriate amount of geopolymer can effectively improve the frost resistance of loess,and the unconfined compressive strength of solidified loess is greater than that of plain loess,up to 0.7 MPa.With the increase of red mud content,the unconfined compressive strength of solidified loess test block decreases.With the increase of freeze-thaw cycles,the unconfined compressive strength of solidified loess test block decreases first and then increases,and finally tends to be stable.
关键词
地聚物固化黄土/水玻璃/含水率/冻融循环/无侧限抗压强度Key words
geopolymer solidified loess/sodium silicate/moisture content/freeze-thaw cycle/unconfined compressive strength引用本文复制引用
基金项目
山西交通控股集团项目(20-JKKJ-17)
出版年
2024
国家科技期刊平台
NSTL
万方数据